Business, business casual, and outright casual are totally different things. What will carry well in jeans or work clothes will not be the same as dockers, let alone dress pants.
I've come to appreciate how well a penknife of 3-1/4" will fit in suit pants. I have a Northwoods (Queen made) Senator (equal-end penknife) that all but disappears in the left front pocket of a suit. I don't even feel the weight of it, and the rounded bolsters makes it easy to carry. The spear and carpenter blades are razor sharp and so thin they seem to melt through whatever I am cutting.
When I'm wearing Carharts, I would never choose that knife, it just wouldn't seem right. I'd go for a bigger knife like a stockman, jack or mini-trapper, or I'd even go with a smaller knife with a boxy profile like a Peanut. But that Senator just wouldn't seem right--it would feel too inconspicuous, like it didn't have enough presence to stand up to the 12 oz. canvas of the work pants.
Ladies and their shoes/jewelry have nothing on us. Pocketknives are like working jewelry for men. I gave up wearing a ring a long time ago. I just don't like to wear jewelry on me. But pocket jewelry? That's another matter!
Now, where's my Case/Bose Norfolk?